I'm using Firefox, where CMD + ALT + ← / → Arrow changes to the next / previous tab. This is an important feature to me.

Since Lion, this shortcut changes the active space to the next and previous space, with no way to customize this. And I want to use spaces, just no with the keybinding. Firefox also won't let me customize my shortcut. How can I change one of those?

(Hint: the Firefox extension "keyconfig" let's you do a lot of keybindings-changes, but not the previous and next tab ones).

Sorry, but I tried System Preferences/Keyboard/Keyboard Shourtcuts of course. Those are additional shortcuts you can set, but that doesn't remove CMD + ALT +Left/Right. The other shortlink you provided leads to an empty side and doesn't tell me where I can set the shortcuts in Firefox.
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AkkuAug 8 '11 at 9:28

1

Plus, you can uncheck Mission Control keyboard shortcuts if you don't use it. By the way, i have Lion too but when i use CMD+ALT+Left/Right shortcut on Firefox (Also Chrome) it doesn't change the space. It's changing tabs normally.
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fatihturanAug 8 '11 at 9:37

Ah, then maybe I configured something strangely that causes my spaces to get changed. This question therefore may just be stupid. Maybe BetterTouchTool or Keyboard Maestro or FunctionFlip have done something wrong here. Thank you!
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AkkuAug 8 '11 at 12:46

Found it: It was the "Switch to Next / Last Application" shortcut that's a default in Keyboard Maestro, that sits on those keys. It switched to an app in another space and did this before Firefox could get the keystroke.
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AkkuAug 8 '11 at 12:51